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hud.c
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#include "hud.h"
// struct grouping together the json key and the function that creates the json object.
struct item {
char* key;
cJSON* (*create)(const HUD*, const HUD*);
};
// for no apparent reason, kunos have decided to set invalid laptime values
// to (2^31)-1 (i can't make sense of why this specific value).
// In order to mitigate sending garbage values like described above: if the
// time is greater than MAX_TIME, then no value is sent instead.
#define MAX_TIME 600000
/**
* prev, best, curr, delta, estimated, currSector, currSectorIndex,
* prevSector, isDeltaPositive, isValidLap.
*
* @param curr Current frame HUD data.
* @param prev Previous frame HUD data.
*/
static cJSON* createLaptimes(const HUD* curr, const HUD* prev) {
cJSON* obj = cJSON_CreateObject();
if (!obj) {
return NULL;
}
// always add the current lap time
// it's always increasing, even when the car is in the pits
INT_2_OBJ(obj, "curr", curr->currLapTime);
// always add the estimated lap time
// prevent adding bogus values greater than MAX_TIME
if (curr->estimatedLapTime < MAX_TIME) {
INT_2_OBJ(obj, "estimated", curr->estimatedLapTime);
}
// only add the previous laptime if prev is not NULL
if (prev) {
if (curr->completedLaps > prev->completedLaps) {
// new lap started
// this should never be a bogus value because it is only added when
// completedLaps differs (and therefore this should be set appropriately)
INT_2_OBJ(obj, "prev", curr->prevLapTime);
}
}
// prevent adding bogus values greater than MAX_TIME
if (curr->bestLapTime < MAX_TIME) {
INT_2_OBJ_CMP(obj, "best", prev, prev->bestLapTime, curr->bestLapTime);
}
INT_2_OBJ_CMP(obj, "delta", prev, prev->delta, curr->delta);
INT_2_OBJ_CMP(obj, "currSectorIndex", prev, prev->currSectorIndex, curr->currSectorIndex);
INT_2_OBJ_CMP(obj, "currSector", prev, prev->currSectorTime, curr->currSectorTime);
BOOL_2_OBJ_CMP(obj, "isDeltaPositive", prev, prev->isDeltaPositive, curr->isDeltaPositive);
BOOL_2_OBJ_CMP(obj, "isValidLap", prev, prev->isValidLap, curr->isValidLap);
return obj;
}
/**
* tc, tcCut, engineMap, abs, rainLight, flasher, headlightState, wiperState,
* leftIndicator, rightIndicator.
*
* @param curr Current frame HUD data.
* @param prev Previous frame HUD data.
*/
static cJSON* createElectronics(const HUD* curr, const HUD* prev) {
cJSON* obj = cJSON_CreateObject();
if (!obj) {
return NULL;
}
INT_2_OBJ_CMP(obj, "tc", prev, prev->tc, curr->tc);
INT_2_OBJ_CMP(obj, "tcCut", prev, prev->tcCut, curr->tcCut);
INT_2_OBJ_CMP(obj, "engineMap", prev, prev->engineMap, curr->engineMap);
INT_2_OBJ_CMP(obj, "abs", prev, prev->abs, curr->abs);
INT_2_OBJ_CMP(obj, "headlightState", prev, prev->headlightState, curr->headlightState);
INT_2_OBJ_CMP(obj, "wiperState", prev, prev->wiperState, curr->wiperState);
BOOL_2_OBJ_CMP(obj, "rainLight", prev, prev->rainLight, curr->rainLight);
BOOL_2_OBJ_CMP(obj, "flasher", prev, prev->flasher, curr->flasher);
BOOL_2_OBJ_CMP(obj, "leftIndicator", prev, prev->leftIndicator, curr->leftIndicator);
BOOL_2_OBJ_CMP(obj, "rightIndicator", prev, prev->rightIndicator, curr->rightIndicator);
return obj;
}
/**
* type, sessionTimeLeft, activeCars, clock.
*
* @param curr Current frame HUD data.
* @param prev Previous frame HUD data.
*/
static cJSON* createSession(const HUD* curr, const HUD* prev) {
cJSON* obj = cJSON_CreateObject();
if (!obj) {
return NULL;
}
if (!prev || prev->session != curr->session) {
char* str;
switch (curr->session) {
case ST_PRACTICE:
str = "Practice";
break;
case ST_QUALIFY:
str = "Qualifying";
break;
case ST_RACE:
str = "Race";
break;
case ST_HOTLAP:
str = "Hot Lap";
break;
case ST_HOTSTINT:
str = "Hot Stint";
break;
case ST_SUPERPOLE:
str = "Super Pole";
break;
default:
str = "Unknown";
}
if (!cJSON_AddStringToObject(obj, "type", str)) {
RET_NULL(obj);
}
}
FLOAT_2_OBJ_CMP(obj, "timeLeft", prev, prev->sessionTimeLeft, curr->sessionTimeLeft);
INT_2_OBJ_CMP(obj, "activeCars", prev, prev->activeCars, curr->activeCars);
FLOAT_2_OBJ_CMP(obj, "clock", prev, prev->clock, curr->clock);
return obj;
}
/**
* Determine the rain intensity level and embed the corresponding string
* in obj under key.
*
* @param ri
* @param obj
* @param key
*/
static cJSON* rainIntensity(RainIntensity ri, cJSON* obj, char* key) {
char* str;
switch (ri) {
case R_DRIZZLE:
str = "Drizzle";
break;
case R_LIGHT:
str = "Light";
break;
case R_MEDIUM:
str = "Medium";
break;
case R_HEAVY:
str = "Heavy";
break;
case R_THUNDERSTORM:
str = "Thunderstorm";
break;
default:
str = "None";
}
return cJSON_AddStringToObject(obj, key, str);
}
/**
* curr, in10, in30.
*
* @param curr Current frame HUD data.
* @param prev Previous frame HUD data.
*/
static cJSON* createRain(const HUD* curr, const HUD* prev) {
cJSON* obj = cJSON_CreateObject();
if (!obj) {
return NULL;
}
if (!prev || prev->rainIntensityCurr != curr->rainIntensityCurr) {
if (!rainIntensity(curr->rainIntensityCurr, obj, "curr")) {
RET_NULL(obj);
}
}
if (!prev || prev->rainIntensity10 != curr->rainIntensity10) {
if (!rainIntensity(curr->rainIntensity10, obj, "in10")) {
RET_NULL(obj);
}
}
if (!prev || prev->rainIntensity30 != curr->rainIntensity30) {
if (!rainIntensity(curr->rainIntensity30, obj, "in30")) {
RET_NULL(obj);
}
}
return obj;
}
/**
* windSpeed, windDirection, track, rain, rain.current, rain.in10, rain.in30.
*
* @param curr Current frame HUD data.
* @param prev Previous frame HUD data.
*/
static cJSON* createConditions(const HUD* curr, const HUD* prev) {
cJSON* obj = cJSON_CreateObject();
if (!obj) {
return NULL;
}
FLOAT_2_OBJ_CMP(obj, "windSpeed", prev, prev->windSpeed, curr->windSpeed);
FLOAT_2_OBJ_CMP(obj, "windDirection", prev, prev->windDirection, curr->windDirection);
// track grip
if (!prev || wcscmp(prev->trackStatus, curr->trackStatus) != 0) {
if (!addWstrToObject(obj, "track", curr->trackStatus)) {
RET_NULL(obj);
}
}
// add rain parameters
cJSON* ptr = createRain(curr, prev);
if (!ptr) {
RET_NULL(obj);
}
if (cJSON_GetArraySize(ptr) > 0) {
if (!cJSON_AddItemToObject(obj, "rain", ptr)) {
cJSON_Delete(ptr);
cJSON_Delete(obj);
return NULL;
}
}
return obj;
}
/**
* fl, fr, rl, rr.
*/
static cJSON* createPressure(const HUD* curr, const HUD* prev) {
cJSON* obj = cJSON_CreateObject();
if (!obj) {
return NULL;
}
FLOAT_2_OBJ_CMP(obj, "fl", prev, prev->pitStopFL, curr->pitStopFL);
FLOAT_2_OBJ_CMP(obj, "fr", prev, prev->pitStopFR, curr->pitStopFR);
FLOAT_2_OBJ_CMP(obj, "rl", prev, prev->pitStopRL, curr->pitStopRL);
FLOAT_2_OBJ_CMP(obj, "rr", prev, prev->pitStopRR, curr->pitStopRR);
return obj;
}
/**
* tyreSet, fuel, pressure, pressure.fl, pressure.fr, pressure.rl, pressure.rr.
*
* @param curr Current frame HUD data.
* @param prev Previous frame HUD data.
*/
static cJSON* createPitstop(const HUD* curr, const HUD* prev) {
cJSON* obj = cJSON_CreateObject();
if (!obj) {
return NULL;
}
INT_2_OBJ_CMP(obj, "tyreSet", prev, prev->pitStopTyreSet, curr->pitStopTyreSet);
INT_2_OBJ_CMP(obj, "fuel", prev, prev->pitStopFuel, curr->pitStopFuel);
cJSON* pressure = createPressure(curr, prev);
if (!pressure) {
RET_NULL(obj);
}
if (cJSON_GetArraySize(pressure) > 0) {
if (!cJSON_AddItemToObject(obj, "pressure", pressure)) {
cJSON_Delete(obj);
cJSON_Delete(pressure);
return NULL;
}
}
return obj;
}
/**
* type, duration.
*
* @param curr Current frame HUD data.
* @param prev Previous frame HUD data.
*/
static cJSON* createPenalty(const HUD* curr, const HUD* prev) {
cJSON* obj = cJSON_CreateObject();
if (!obj) {
return NULL;
}
INT_2_OBJ_CMP(obj, "type", prev, prev->penalty, curr->penalty);
FLOAT_2_OBJ_CMP(obj, "duration", prev, prev->penaltyTime, curr->penaltyTime);
return obj;
}
/**
* totalRemaining, stintRemaining.
*
* @param curr Current frame HUD data.
* @param prev Previous frame HUD data.
*/
static cJSON* createDrivingTime(const HUD* curr, const HUD* prev) {
cJSON* obj = cJSON_CreateObject();
if (!obj) {
return NULL;
}
INT_2_OBJ_CMP(obj, "totalRemaining", prev, prev->totalTimeLeft, curr->totalTimeLeft);
INT_2_OBJ_CMP(obj, "stintRemaining", prev, prev->stintTimeLeft, curr->stintTimeLeft);
return obj;
}
/**
* used, rate.
*
* @param curr Current frame HUD data.
* @param prev Previous frame HUD data.
*/
static cJSON* createFuel(const HUD* curr, const HUD* prev) {
cJSON* obj = cJSON_CreateObject();
if (!obj) {
return NULL;
}
FLOAT_2_OBJ_CMP(obj, "used", prev, prev->fuelUsed, curr->fuelUsed);
FLOAT_2_OBJ_CMP(obj, "rate", prev, prev->fuelPerLap, curr->fuelPerLap);
return obj;
}
static cJSON* createYellow(const HUD* curr, const HUD* prev) {
cJSON* obj = cJSON_CreateObject();
if (!obj) {
return NULL;
}
BOOL_2_OBJ_CMP(obj, "global", prev, prev->globalYellow, curr->globalYellow);
BOOL_2_OBJ_CMP(obj, "sector1", prev, prev->yellow1, curr->yellow1);
BOOL_2_OBJ_CMP(obj, "sector2", prev, prev->yellow2, curr->yellow2);
BOOL_2_OBJ_CMP(obj, "sector3", prev, prev->yellow3, curr->yellow3);
return obj;
}
/**
* curr, yellow, yellow.global, yellow.sector1, yellow.sector2, yellow.sector3, white,
* green, chequered, red.
*
* @param curr Current frame HUD data.
* @param prev Previous frame HUD data.
*/
static cJSON* createFlag(const HUD* curr, const HUD* prev) {
cJSON* obj = cJSON_CreateObject();
if (!obj) {
return NULL;
}
INT_2_OBJ_CMP(obj, "curr", prev, prev->flag, curr->flag);
BOOL_2_OBJ_CMP(obj, "green", prev, prev->globalGreen, curr->globalGreen);
BOOL_2_OBJ_CMP(obj, "chequered", prev, prev->chequered, curr->chequered);
BOOL_2_OBJ_CMP(obj, "red", prev, prev->globalRed, curr->globalRed);
BOOL_2_OBJ_CMP(obj, "white", prev, prev->globalWhite, curr->globalWhite);
cJSON* yellow = createYellow(curr, prev);
if (!yellow) {
RET_NULL(obj);
}
if (cJSON_GetArraySize(yellow) > 0) {
if (!cJSON_AddItemToObject(obj, "yellow", yellow)) {
cJSON_Delete(yellow);
cJSON_Delete(obj);
return NULL;
}
}
return obj;
}
// remember to update when adding additional sub-objects
#define HUD_ITEM_COUNT 9
static const struct item items[HUD_ITEM_COUNT] = {
{"laptimes", &createLaptimes},
{"electronics", &createElectronics},
{"session", &createSession},
{"conditions", &createConditions},
{"pitstop", &createPitstop},
{"penalty", &createPenalty},
{"drivingTime", &createDrivingTime},
{"fuel", &createFuel},
{"flag", &createFlag}
};
/**
* Adds the sub-objects above along with: trackStatus, position, distanceTraveled,
* laps, isBoxed, isInPitLane, mandatoryPitDone, rainTyres, tyreCompound.
*
* @param obj Object to add values to.
* @param curr Current frame HUD data.
* @param prev Previous frame HUD data.
*/
cJSON* hudToJSON(cJSON* obj, const HUD* curr, const HUD* prev) {
INT_2_OBJ_CMP(obj, "position", prev, prev->position, curr->position);
FLOAT_2_OBJ_CMP(obj, "distanceTraveled", prev, prev->distanceTraveled, curr->distanceTraveled);
INT_2_OBJ_CMP(obj, "laps", prev, prev->completedLaps, curr->completedLaps);
INT_2_OBJ_CMP(obj, "tyreSet", prev, prev->currTyreSet, curr->currTyreSet);
BOOL_2_OBJ_CMP(obj, "isBoxed", prev, prev->isBoxed, curr->isBoxed);
BOOL_2_OBJ_CMP(obj, "isInPitLane", prev, prev->isInPitLane, curr->isInPitLane);
BOOL_2_OBJ_CMP(obj, "mandatoryPitDone", prev, prev->mandatoryPitDone, curr->mandatoryPitDone);
BOOL_2_OBJ_CMP(obj, "rainTyres", prev, prev->rainTyres, curr->rainTyres);
// add sub-objects
for (int i = 0; i < HUD_ITEM_COUNT; i++) {
cJSON* ptr = items[i].create(curr, prev);
if (!ptr) {
RET_NULL(obj);
}
// only add ptr to the object if it has at least one sub key
if (cJSON_GetArraySize(ptr) > 0) {
if (!cJSON_AddItemToObject(obj, items[i].key, ptr)) {
cJSON_Delete(ptr);
cJSON_Delete(obj);
return NULL;
}
} else {
cJSON_Delete(ptr);
}
}
return obj;
}
/**
* Get a status as a wchar_t*.
* @param s
* @return No need to free.
*/
const wchar_t* wstrStatus(Status s) {
switch (s) {
case STATUS_OFF:
return L"Not in session";
case STATUS_REPLAY:
return L"Watching replay";
case STATUS_LIVE:
return L"In car";
case STATUS_PAUSE:
return L"Paused";
}
return L"Unknown";
}